Your elementary school has 14 EL students in first grade and 4 EL students in second grade. These EL students are all at the Pre-Emergent or Emergent levels. According to the Student Grouping for SEI Classrooms (Structured English Immersion Models, 2014) how should these students be placed for optimal instruction?

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (–4, 0) and (6, 0). the y-intercept of the first parabola is (0, –12). the y-intercept of the second parabola is (0, –24). what is the positive difference between the a values for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth